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Summa : Journal of Accounting and Tax
ISSN : -     EISSN : 30314216     DOI : https://doi.org/10.61978/summa
Core Subject : Economy,
Summa: Journal of Accounting and Tax with ISSN Number 3031-4216 (Online) published by Indonesian Scientific Publication, is a leading peer-reviewed, open-access scientific journal dedicated to publishing high-quality research, analytical papers, and case studies in the fields of accounting and taxation. Since its establishment, Summa has been committed to advancing both theoretical understanding and practical applications of accounting and taxation in the ever-evolving business landscape.
Articles 51 Documents
Leveraging Sustainability: How Firm Size Shapes the Value-Creating Effects of Carbon Emission Disclosure and Environmental Performance on Firm Value Ardelia, Ranti; Paramita, Veronika Santi
Summa : Journal of Accounting and Tax Vol. 4 No. 1 (2026): January 2026
Publisher : Indonesian Scientific Publication

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61978/summa.v4i1.1347

Abstract

As the severity of global warming escalates, investors increasingly favor firms demonstrating strong environmental responsibility, underscoring the growing importance of sustainability in capital market decisions. This study examines the effect of carbon emission disclosure and environmental performance on firm value, considering firm size as an interaction factor within IDX-listed energy firms during the 2019–2024 period. This study utilizes longitudinal secondary datasets sourced from audited financial disclosures and corporate sustainability reports. The sample consists of 11 energy companies selected through purposive sampling. Carbon emission disclosure is measured using the GRI 305 index. Environmental performance is proxied by PROPER ratings. Firm value is calculated by price-to-book value (PBV), and the natural logarithm of total assets represents firm size. Data were analyzed using panel data regression and Moderated Regression Analysis (MRA). The results indicate that carbon emission disclosure does not significantly affect firm value. Environmental performance, however, shows a negative influence on corporate valuation. Furthermore, firm size does not moderate the relationship between carbon emission disclosure and firm value, but it significantly moderates the relationship between environmental performance and firm value. These findings indicate that environmental performance is generally perceived by the market as a cost-intensive activity, exerting a negative effect on firm value, particularly for smaller firms. However, the positive interaction between environmental performance and firm size suggests that larger firms can leverage their scale to translate environmental efforts into relatively greater value creation, highlighting the importance of aligning sustainability strategies with firm size for long-term value.